Bulimia?

[UglyDuckling]

Hi there...
13 years old
168 cm
58 kg (-> 127,87 lb)
BMI: 20.5

I suffer. I'm the fattest girl in my class. I'm slow and clumsy and I skip sport lesson because I'm so ashamed. I want to lose weight, so I eat nothing, but fruits all day but I often get an eating attack. I eat lots of sweet things and then I'm disgusted by myself. I drink salt-water and put my fingers in my mouth to puke. (It doesn't rly work .__.) Sometimes I spend over an hour with crying and trying to get the food out of my body -.-'
Am I bulimic...? Or is it just a 'phase'? What shall I do? I'm afraid... But to be honest, not of the illness. I'm afraid of being fat my whole life...
idk what to do o_O

[FullyAlive]

This reminds me of me almost three years ago when I was your age. I used to do the same, I wouldn't eat all day then I'd get hungry binge on bad stuff and then make myself throw up. It's a really bad thing to get into. Just look around this forum and you'll find many examples of what this can do to you.
First of all you need to try to start eating 3 healthy, normal sized meals a day. If you don't eat properly you'll become ill. If you want to lose weight do it the healthy way. Eat three meals a day, cut down on snacks and sweets. And start doing exercise regularly. You can look at threads offering advice on losing weight properly on here. This should help you lose weight healthily.
Secondly you need to address your issues with how you see yourself and your body image. If you get a bit more self confident then it can really change how you see yourself. You could also consider talking to someone about how you feel.